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      https://www.ias.ac.in/article/fulltext/sadh/045/0283

    • Keywords

       

      Zigzag mist eliminators; CFD simulation; Roughness; Removal efficiency; Pressure drop

    • Abstract

       

      In this paper, the effects of channel roughness on the droplet removal efficiency and pressure drop in a zigzag mist eliminator are investigated. The fluid flow, droplet dispersion and deposition through the demister are modelled using a commercial Computational Fluid Dynamics (CFD) tool. The turbulent airflow issimulated using two different Shear-stress Transport (SST) k-w model and Reynolds Stress Model (RSM) with enhanced wall treatment. The Eddy Interaction Model (EIM) is also used to predict the trajectories of thedroplets in the gas flow. The results show that inserting roughness increases the maximum velocity of the gas flow at the bends and enhances the removal efficiency with a little cost of an increase in the pressure drop foreach bend. At the velocity inlet of 2 m/s with 6 lm droplets, the pressure drop and removal efficiency of the threaded zigzag demister with 5 threads increases by 22.7% and 16.08 %, respectively. Moreover, a higher value for the figure of merit is achieved for the threaded demister compared with the smooth unit which means that the effect of higher removal efficiency of the threaded unit is more pronounced than the effect of higher pressure drop showing the advantages of adding threads in demisters

    • Author Affiliations

       

      FARHAD ALAMSHAHI1 HASSAN RAHIMZADEH11 ROOHOLLAH RAFEE2 ROOHOLLAH RAFEE2 M A MOGHIMI3 4 5 POUYAN TALEBIZADEHSARDARI6 7

      1. Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran
      2. Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
      3. Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
      4. Faculty of Electrical – Electronic Engineering, Duy Tan University, Da Nang 550000, Vietnam
      5. Department of Engineering and Design, Staffordshire University, Stoke-On-Trent ST4 2DE, UK
      6. Metamaterials for Mechanical, Biomechanical and Multiphysical Applications Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam
      7. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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